Device for contouring grinding wheels



Dec.v 2, 1958 v'r. J. PESCE 2,862,493r

, DEVICE: FOR coNToURING GRINDING WHEELS INVENTOR. THEopoRE J PESCE.

/7 TTRNEY.

T. J. PESCE DEVICE FOR CONTOURING GRINDING WHEELS Dec. 2, 1958 2 sheetsLsnee: 2

Fiied may 24, 1957 THEoDoRE J PESCE.

United States Patent 2,362,493 Y DEVICE FOR coNroURINGeiuNDING Application May 24, 1957, serialrNo; 661,368' 4*.clai'ms. (ci. 12s-1.1)

This invention relates to a device for'contouring. grind-` ing, wheels and more particularly to a device for-shaping the. contour of a grindingvr wheel in a grinding machine to con-form with a template for', the shape of workpieces that are ground in said machine.

An object of myinvention is to provide such a device which may be readily attachedto agrinding machine for contouring the grinding wheel thereof.

A further object is the-'provisionof a; novel construction'- for suchv a device whichV will render it easy toi use andY highly efficient in its operation. L

A- still furtherV object is topro'vide such a device which is completely self-contained anddriven. independently of the machine in which it is used.

Further ob'ect's 'and advantages ofv this invention'will be clearly understood from the following description and from the accompanying drawings in which:

Fig. 1 is a plan view of the device embodying the present invention; parts thereof being omitted to show its construction.

Fig. 2 is a sectional side view on line 2 2 of Fig. 1.

Fig. 3 is a sectional front view on line 3 3 of Fig. 2.

Fig. 4 is a side view of said device; parts thereof being shown in section. Y

In the embodiment of my invention which is shown in the drawings, the device includes a pair of side members 5 5 which are connected by a tie bar 6 and a slide bar 7 having binding nuts 8 8 and 9 9, respectively, threaded thereto.

A carrier member 10 is slidably mounted upon the slide bar 7 and is moved along the same by means of a feed screw 11 that is rotatably mounted in bearings 12 and 13 in the side members. The said feed screw has mounted thereon a worm gear 14 which is rotated by a worm pinion 15 that is driven by speed reducing means such as a worm gear 16 that is rotated by a worm pinion 17 which is driven by a suitable electric motor 18 that is mounted upon a support 19 and is preferably reversible so as to drive the feed screw in opposite directions.

The said carrier member 10 has a body portion with a transverse boss 20 which is slidable upon the slide bar 7, another transverse boss 21 that is threaded to the feed screw 11 and a longitudinal boss 22 in which there is slidably mounted a plunger 23 that extends through the boss 22 and has, at its inner end, a suitable dressing tool 24 that is adapted to control and dress the grinding surface of a grinding wheel 25 which is associated with said grinding machine.

At the front end of the plunger 23 there is provided a tracer, preferably in the form of a roller 26, which is rotatable on a vertical shaft 27 and engages a template 28 that is detachably mounted upon a supporting bar 29 which is secured to and extends between the side members 5 5. The tracer roller 26 is urged in the direction of the template 28 and retained in engagement therewith by means of a suitable spring 30 which preferably surrounds the plunger 23 and is disposed between the boss 22 and an anchoring bar 31 that is secured to the 2,862,493- Y lamented` im. 2,-.1195'8 LCC p 2 said plunger and retains it against rotation by means of guide screws 32 32.which extend vertically through the opposite. sides ofsaid anchoringfbar and slidably engage the under surface of a horizontally disposed` extension 33 on the carrier member.k I -1 My, improved dviceismounted4 in a c onyentional grindingmachineby means ofkaxial mounting studs 2M- -l 34 which project fromthe outer sides-ofi the sidemembers 5 5 and are countersunkf to receivethe centers 35 35 that extend axiallyfrom the spindle and; tail stock of the grinding machine.`

In order to prevent rotation of. said, device about Vthe axis of the centers,35 35', it isanchored to the grinding machine by means of suitable clamping washersr 36 36 that surround posts'31'-7 37 which extend upwardly from l an anchoring plate 3 8l that is secured, to a suitable part of the grindingy machine, lsuch as the way- 39, byA means ofthescrews 40 40 Each of the said washers 36 restv upon. anl abutment 41 adjacent to the respective post37 and clamping-,nuts

, 42 42 are',pr oyided v,for forcing thefextensions 43 43 Irl-the lssroffmfnimproved dtssinadevicef itis. first mounted between the centers 35``35z-ofther rgrinding machine `and clampe'din position by thevclampingy washers, 36 36. ,Thel grinding wheel,v isthen put' in rotation and movedforwardly intocontact.Y with the1 dressing tool 24arrd the device? isA putinto operationbymenergizing; the motor 18 which will then drive the screw shaft 11 and thereby slide the carrier 10 across the said device and move the tracer roller 26 along the template 28 so that it will slide the plunger 23, against the pressure of the spring 30, and thereby cause the dressing tool 24 to shape, or dress, the grinding wheel to conform exactly to the shape of the template.

The motor 18 may be reversed so that it will rotate the screw shaft 11 in opposite directions and thereby cause the dressing tool to be moved back and forth across the grinding wheel as many times as may be necessary in order to complete a dressing operation. I-f desired, suitable reversing means may be used for automatically reversing the said motor at the end of each pass of the carrier across the device in either direction.

I claim:

l. A grinding wheel shaping and dressing device including a frame having a pair of side members, parallel tie bars between said members, a carrier slidable on one of said tie bars, a screw bar rotatably mounted on said side members and extending therebetween parallel to the tie bars, an extension on said carrier in threaded engagement with said screw bar, a plunger slidably mounted in said carrier, a dressing tool carried at one end of said plunger and adapted to engage a grinding wheel, a tracer member at the opposite end of the said plunger, a supporting bar extending between said side members, a template secured to said supporting bar in position to be engaged by the said tracer member, axial means upon the opposite sides of said side members adapted to engage the centers of said grinding machine for mounting the said device therein in operative position relatively to the grinding wheel, clamping means for securing the said device against rotation about the axes of said centers, and means for driving said screw bar in alternately opposite directions.

2. A grinding wheel shaping and dressing device in cluding a frame having a pair of opposed side members, tie bars extending between said members and securing them together in spaced position, a screw bar rotatably mounted in said side members and extending therebetween, a carrier slidable on one of said tie bars, an extension on said carrier having a threaded hole adapted to receive the said screw bar for threaded engagement of the carrier therewith, means for driving said screw bar in alternately opposite directions to thereby slide said carrier crosswise between the ,side members, a plunger slidable in'said carrier, a dressing tool at one end'of said plunger adapted tol engage a grinding wheel in ay grinding machine, `atracerat the Vopposite end of thev plunger, a supporting bar extending between the side members, a template mounted on said supporting bar in position to be tracedy by the tracing member, an extension on said carrier having a flat surface parallel to the axis of the plunger, a guide bar secured to said plunger, means on said guide'bar engageable with said lilat surface of the extension to prevent rotation of the plunger during sliding movement thereof, bosses extending outwardly from said side members and having axial recesses therein adapted to receive the'centers ofthe grinding machine for mount ing the saiddevice therein adjacent to the grinding wheel,

a clamping bar securedto a portion of said grinding machine and having clamping means thereon, and extensions on said side members receivable in said clamping means for positioning the said device in theV grinding machine and preventing rotation thereofv'about the axis of the centers. Y I

3. A grindingwheel vshaping and dressing device as setv forth in claim 2 vincluding an electric motor mounted upon the frame thereof, and a driving connection between said motor and the screw bar for drivingl said screw bar in opposite directions. j

4.'A grinding wheel shaping Vand dressing device including a frame having a pair of sideY plates, a tie bar connecting said plates in spacedl relation, a screw bar rotatably mounted in said plates parallel to the tie bar 2,862,1103`v u .f

and spaced therefrom, a carrier slidable on the slide bar, an extension on the carrier in threaded engagement with th'e screw bar, a supporting bar extending across the tops of the side members, an electric motor mounted upon the said supporting bar and connected to the screw bar for rotating it in alternately opposite directions, the said frame having upon the outer sides of the side members a pair of axial recesses for receiving the centers of a grinding machine to mount the said devicetherein in operative position relatively to a grinding wheel associated therewith, a clamping bar mounted upon a way of the said machine, a pair of posts extending vertically from said clamping bar, projections on the side members extending rearwardly therefrom to a position adjacent to the said posts, a pair of adjusting screws threaded to the clamping bar and engageable withl said projections for adjusting the device about the axes of the centers, clamping means on said posts for clamping the said projections against the adjusting screwsand preventing rotation of the device about the said axes of the centers, atracer member carried .by said calrer, and a template engageable by said tracer member. f

y y Referencest-Citedin the tile of thisV patent UNITED STATES PATENTS 

